April 16, 2011
Tangrams Book, a copy of which was owned by Lewis Carroll
According to this book, Lewis Carroll had a copy of this book in his library. He was a fan of tangrams.
(reference http://books.google.com/books?id=aJZz_VWTCC8C&pg=PA4&lpg=PA4&dq=tangrams+lewis+carroll+book&source=bl&ots=iuU-EWcMjR&sig=llfgqFD0Iaov8k64e4dETdMfmEA&hl=en&ei=CvupTYeAMefTiALbk6HvDA&sa=X&oi=book_result&ct=result&resnum=5&ved=0CCQQ6AEwBA#v=onepage&q=tangrams%20lewis%20carroll%20book&f=false )